AUGUSTA, Ga. (AP) -- Danny Willett has won the Masters after a stunning collapse by Jordan Spieth.

Willett shot a closing 67 for a 5-under 283 total. He was assured of his first major title when Spieth made bogey at the 17th hole.

Spieth seemed certain to become only the fourth player to win back-to-back titles at Augusta National when he made the turn with a commanding five-shot lead. But, in less than an hour, he had totally thrown it away, handing the championship to England's Danny Willett.

Willett ultimately beat Spieth and Lee Westwood by three strokes.

Spieth will be kicking himself for a while about this one. After consecutive bogeys at the 10th and 11th, he dumped two shots into the water at the 12th for a quadruple-bogey 7. Just like that, he went from five shots ahead to three shots behind.

Spieth tried to rally, but a bogey at No. 17 ended any hopes of a comeback.